玄武岩标准样品铁铜锌同位素组成.pdf

2012年4月
岩矿测试
Apri 2012
ROCK AND MINERAL ANALYSIS
218~224
文章编号:0254-5357(2012)02-0218-07
玄武岩标准样品铁铜锌同位素组成
唐索寒,闫斌,朱祥坤,李津,李世珍
(中困地质科学院地质研究所,国土资源部同位素地质重点实验室,大陆构造与动力学国家重点实验室
北京10003
摘要:报道了三种玄武岩标准样品(BCR-2、BIR-1a和CBW07105)的铁铜锌同位素数据。实验使用
HNO3-HF混合酸消解玄武岩标准样品;AGMP-1阴离子交换树脂分离提纯样品中的铜铁铎,利用多接收
等离子体质谱仪(MC- ICPMS)测定铁铜锌同位素比值,分析过程中使用样品一标准一样品交又法校正仪器
的质量分馏。实验得到BCR-2、BIR-1a和GBW07105标准样品的高精度铁铜锌同位素组成(95%置信水
平的不确定度)分别为:6° fence2-=0.070%o0.018%o(2SD),S°Cuc2s8=0.16%o±0.04?o
2SD),8°Znr
BCR-2-TRMM3
m=-0.072%00.020%0(2SD);S56Feam-mw,=0.044%o±0.026%(2SD
8 Cu-1-mio=0.027%o±0.019%(2SD),86Znm-_ma=0.085%士0.032%o(2SD);8Fe
CBW7105- IRMMO14=0.126%0±0.039%o(2SD),8° Cu7-sp8=0.12%o±0.01%o(2SD),
8°7 n na:7o5-mo=0.22%±0.03%a(2SD)。这些数据在误差(不确定度)范围内与国际上已发表的数据
是一致的。三个玄武岩标准样品的铁铜锌同位素组成数据的发表为铁铜锌同位素研究提供了统一的标准
使地质样品的铁铜锌同位素数据的质曼监控成为可能。
关键词:玄武岩标准样品;铁铜锌同位素;多接收等离子体质谱法
中图分类号:P588.145;0628.21;0657.63
文献标识码:
Iron, Copper and Zinc Isotopic Compositions of Basaltic Standard
Reference Materials
TANG Suo-han, YAN Bin, ZHU Xiang-kun, LI Jin, LI Shi-zhen
State Key Laboratory for Continental Tectonics and Dynamics, Key Laboratory of sotopic Geology
The Ministry of Land and Resources, Institute of Geology, Chinese Academy of Geological Sciences
Beijing 100037, China
Abstract: Fe, Cu and Zn isotopic compositions of 3 basaltic standard reference materials of BCR-2, BIR-1A and
GBW 07105 were reported in this paper. The basaltic samples were digested with HNO, -HF mixed acids. Anion
exchange resin AGMP-1 was used in the separation of Fe, Cu and Zn from other elements. Fe, Cu and Zn isotopic
ratios were determined by Multiple Collector-inductively Coupled Plasma-mass Spectrometry(Mc-icpms), and
isotopic mass fractionation was calibrated by Standard-sample bracketing. The Fe, Cu and Zn isotopic composition
of 3 basaltic standard reference materials(at 95% confidence level) were as follows: 6. MM014=0.070%0
0.018%0(2SD),S° Cu2s8=0.16%ot0.04%(2SD),86 ZNRCE.2.IRN=-0.072%o±0.020%o(2SD);
6 Fe=0.044%o±0.026%。(2SD),6°CuRs=0.027%v0.019%o(2SD),6Zn
BIR-1A-IRMM3702 s
收稿日期:2011-12-09;接受日期:2012-(02-20
基金项目:国土资源公益性行业科研专项经费项目(200911043-17);中国地质大调査项目(1212011120295)
作者简介:唐索寒,研究员,从事同位素地球化学研究。E-mail:tangshan@yahoo.com.cn
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